Finding the Fourth Proportional to 15,791.56, 23,685.72 and 5,404.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,791.56 : 23,685.72 = 5,404.12 : x
2. Step 2: Convert to fraction form
   15,791.56/23,685.72 = 5,404.12/x
3. Step 3: Cross multiply
   15,791.56x = 23,685.72 × 5,404.12
4. Step 4: Simplify right side
   15,791.56x = 128,000,473.17
5. Step 5: Solve for x
   x = 128,000,473.17/15,791.56
6. Step 6: Final answer
   x = 8,105.63